<?php
/*

*/
$path = dirname(__FILE__);
require_once "{$path}/phpqrcode.php";

class Silk_Zgb_QrController extends Mage_Core_Controller_Front_Action{
    public function renderAction()
    {
        $sku = $this->getRequest()->getParam('sku');
        QRcode::png($sku); 
    }
}